DE20318427U1 - Target panel for laser weapons used in police training, has perforated impact zones to pass light through to sensors mounted at rear - Google Patents

Abstract

The target panel includes marked impact zones, each of which is perforated to allow light through. Light sensors are mounted behind it to detect light passing through the marked zones.

Description

The invention relates to a Target on which there are one or more marked hit zones that indicate when a laser beam strikes that they were hit.

For the shooting training of police officers in Germany were nationwide in the Police regulation 211 symbols set during the shooting training must be used. During the Shooting training usually takes place in this regard instead of that shooter those projected onto a screen or glued onto cardboard disks Shooting symbols.

Finds the bombardment with laser weapons instead, a laser spot created by a laser beam is simulated the projectile. Since the laser point is only a fraction of a second appears and then disappears immediately, becomes a detection and evaluation of the meeting point uses a hit recording camera, which compares the position of the point with hit zones, which in one Computer were saved. This changes to show the hit symbol usually hits the color or disappears completely.

The disadvantage of this known method consists in the fact that a considerable financial effort is involved must be because a computer with extensive software, a large-screen projector and a camera with associated Interference filters have to be purchased to evaluate these large-scale targets to be able to.

In addition to the high acquisition costs but also speak technical reasons against this commonly used systems.

Because a hit-recording camera is common in Germany works according to the PAL system, it takes 25 pictures per second on. This means that an image is only saved every 40 milliseconds becomes. But this also means that the laser flash is at least 40 Must be milliseconds long if it is to be recorded safely. Thereby a "painting" with that after the Pulling the trigger emitted laser light very likely since the gun is not completely in hand lies quietly. If the laser weapon also has a recoil like often common today then the ripping is the Weapon, and inevitably drawing a laser line.

In this case, the system takes one any point from one created by the movement of the weapon Line on that with the point created by a projectile would, almost never matches. Compare with high speed cameras that are a thousand and more This fact can take pictures in a second adequately documented and deviations of up to 170mm shown.

In contrast to the above, known detection methods for large-scale goals This invention is a method based on large screen projector and hit-taking camera and computer completely dispensed with. Furthermore detects the laser spot in the range of nanoseconds instead, so that "painting" with the laser is completely impossible.

The target consists of a front plate ( 1 ), a back wall ( 5 ) and side panels. The symbols used for shooting training ( 2 ) are mounted on a plate that serves as the front of the target. Each symbol is color-coded on it and then provided with small holes or punched-out areas. If, for example, a rectangle is shown as a target, the rectangle is highlighted in color from the target and perforated with small holes all over. There are light sensors at intervals behind the perforated surface ( 3 ) in light-tight, reflective hollow shapes ( 4 ) are attached to the rear wall of the target. The light from the laser beam, which penetrates through the holes in the hole pattern, is detected by the light sensors.

If a metal plate, e.g. made of aluminum, used as a target, and this was done by punching tools perforated neatly, then occurs when the laser beam strikes another physical effect associated with this invention use power.

Normally, a laser spot that strikes a perforated surface that is not horizontally opposite the muzzle of the weapon would emit less light to the light sensors, making it necessary to use larger quantities of sensors. This results from the strength of the material, which prevents a large part of the light from entering the mold. By using highly reflective material such as aluminum, this is reflected on the inner edge ( 8th ) of the punched-out hole reflecting laser light according to the principle "angle of incidence = angle of reflection" into the cavity. The need to mount more sensors in the lower, upper or lateral area of the target is thus eliminated. This leads to a drastic reduction in the sensors otherwise required.

To prevent neighboring Symbols incorrectly triggered by reflected light , the respective symbol is represented by a precisely fitting, light-tight Cavity limited behind the target. The hollow shape consists of Light reflective material that hits the laser light this against the also reflective back of the front panel of the Mirrored target and thereby the parallel light of the laser is distributed over a large area in all directions. This also increases the number of sensors required reduced. The few needed Light sensors are preferably inside the hollow mold across from the perforated surface.

Attaching the sensors at a greater distance from the hole pattern leads to the fact that Artificial ceiling light, as is usually available in shooting cellars, with adequate dimensions of the perforated plate and with the right choice of light frequency, offers sufficient protection against false triggering.

The photocurrent of the sensors through the laser light triggered is reinforced and forwarded to an evaluation unit. The rise times of the Photo currents are usually 20 ns. The evaluation of the hit by the evaluation unit is a few hundred times faster than it is a commercial one Camera could. The signal from the evaluation unit is forwarded to a hit display.

Due to the high detection speed of the The evaluation unit is also the evaluation of the fire from laser operation converted machine guns and pistols easily possible.

If a symbol has been hit, a light source located on the inner edge of the hollow form switches on ( 7 ) on. This illuminates the cavity behind the target and shows the hit clearly visible to the shooter from behind through the hole pattern. Other optical or acoustic signals or hit displays can also be controlled.

A random generator that is the light source flash rhythmically in one of the symbols to indicate a hit leaves, and thus the shooter to fire at a specific target is in the target integrated. If the symbol is hit, the flashing signal turns to a fixed light signal.

Switching on the random generator and the reset the system in the starting position by means of an associated remote control instead of.

Claims (6)

Target for laser weapons, characterized in that each marked target zone is translucently perforated to allow the laser light to pass through, and there are one or more light sensors behind it. Target according to claim 1, characterized in that behind the perforated hit zones there are opaque or light reducing limits are located to prevent false triggering of neighboring ones To prevent hit zones. Target according to claim 1 or 2, characterized in that the inside of the punched holes and the back can reflect light from the perforated front wall. Target according to claims 1-3, characterized in that the spaces created by demarcation behind the panel are light can reflect. Target according to one of the preceding claims 1 to 4, characterized in that the laser light via light sensors to an evaluation unit is forwarded, which in turn indicates a hit. Target according to claims 1-5, characterized in that a hit is displayed optically or acoustically.